Red = Muslim majority countries from which (even fully legal) travel is banned, yellow = not banned Muslim majority that Trump happens to have business dealings in.
Fun fact: even if this ban was enacted 3 decades ago it would have stopped a grand total of one terrorist attack (https://en.wikipedia.org/wiki/2016_O...versity_attack) during that time period. Every single other attack, including 9/11, the Orlando shooting, the San Bernardino shooting, and the Boston Bombing, was committed by an immigrant from a non-banned country, an American national whose parents immigrated from a non-banned country, or an American convert.
However, if we include the Muslim-majority countries that Trump (coincidentally, of course) has business dealings with in the ban, and assuming the ban would have actually stopped terrorists in those countries from coming to America, then it would have stopped a significant number of attacks (including 9/11) since most perpetrators of Islamist terrorist attacks in the US come from Saudi Arabia and Egypt.
I'm pretty confused as to why he chose to ban people from these countries and not the ones that would, if we assume that the ban was effective, actually stop terrorism.